Keeping pipes properly connected is clearly an important aspect of any sewer maintenance system. A new ASTM International standard, F 2561, Practice for Rehabilitation of a Sewer Service Lateral and Its Connection to the Main Using a One-Piece Main and Lateral Cured-in-Place Liner, has been developed that makes the process of keeping sewer pipelines connected more effective. Practice F 2561 is under the jurisdiction of Subcommittee F17.67 on Trenchless Plastic Pipeline Technology, which is part of ASTM International Committee F17 on Plastic Piping Systems.
Practice F 2561 covers requirements and test methods for the reconstruction of a sewer service lateral pipe and its connection to the main pipe without excavation. This is done using a resin impregnated one-piece main and lateral cured in-place lining that is installed into the piping by means of air or water inflation and inversion. This installation, when cured, is a continuous, one piece, tight fitting, corrosion-resistant lining that extends over a predetermined length of the lateral pipe and the adjacent section of the main pipe.
“The typical application of the standard will be to renew a lateral pipe and provide a verifiable non-leaking connection to the main pipe by simultaneously renewing a short section of the main at the full circumference,” says Larry Kiest, CEO/president, LMK Enterprises, Inc. “It is a practical application, as the entire renewal process is accomplished with no excavation of any kind.”
Kiest notes that F 2561 is based on engineering practices in which the user can design a liner for external and hydrostatic loading by calculating the depth of the pipe, the water table and the flexural modulus versus the thickness of the cured-in-place pipe. “This standard eliminates the guessing and wishful thinking and puts proven materials and installation methods in the hands of the user,” says Kiest.
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For further technical information, contact Larry Kiest, Jr., LMK Enterprises, Inc., Ottawa, Ill. (phone: 888/433-1275; LMKLiner@aol.com). Committee F17 meets Nov. 13-16, during the November Committee Week in Atlanta, Ga. For membership or meeting information, contact Robert Morgan, ASTM International (phone: 610/832-9732; firstname.lastname@example.org).